package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;
    /**
     * 用户下单
     * @param orders
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取用户id，指定指哪个用户
        Long currentId = BaseContext.getCurrentId();
        orders.setUserId(currentId);
        //根据用户id查询购物车数据
        LambdaQueryWrapper<ShoppingCart> cartQuery = new LambdaQueryWrapper<>();
        cartQuery.eq(ShoppingCart::getUserId,orders.getUserId());
        List<ShoppingCart> cartList = shoppingCartService.list(cartQuery);

        if (cartList == null || cartList.size() == 0){
            throw new CustomException("购物车为空，不能下单");
        }
        //查询用户信息
        User user = userService.getById(orders.getUserId());

        //查询地址信息
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null){
            throw new CustomException("用户地址信息有误，不能下单");
        }

        //订单号
        long orderId = IdWorker.getId();

        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetailList = cartList.stream().map((item)->{
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            //实现金额的累加  getAmount订单的单个金额  multiply相当于相乘  new BigDecimal(item.getNumber())订单的份数
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());


        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        //订单状态 1待付款，2待派送，3已派送，4已完成，5已取消
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() != null ? "" : addressBook.getProvinceName())
                        +(addressBook.getCityName() != null ? "" : addressBook.getCityName())
                        +(addressBook.getDistrictName() != null ? "" : addressBook.getDistrictName())
                        +(addressBook.getDetail() != null ? "" : addressBook.getDetail()));

        //向订单表插入一条数据
        this.save(orders);

        //订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetailList);

        //清空购物车
        shoppingCartService.remove(cartQuery);
    }
}
